Your psychic gift allows you to use telekinesis to extend your weapon's reach when fighting in melee.

Benefit: When you make a melee attack against a creature, you may spend a single expertise die to increase the reach of your melee attacks by 10 feet, until the end of your turn.

Mind Over Matter

You have focused on using your telekinesis to raise or lower the surface temperature of your weapon.

Benefit: When you make a successful melee attack, you may spend a single expertise die to change the damage type to cold or fire.

Poltergeist

Your mastery of telekinesis allows you to attempt to turn your environment into a weapon

Benefit: As a standard action, you may spend expertise dice to make a ranged improvised weapon attack against a creature within 40 feet of the improvised object. Use your full weapon bonus on the ranged attack roll. Roll any expertise dice you spend this way and the creature takes bludgeoning damage equal to the result.